Audio on certain channels skipping/stuttering

This mostly happens on Sundance, but sometimes on AMC. Also happened a few times on some other channels, but more rare. Intermittently, the audio skips or stutters on the Hopper 3 as well as the Joeys. Sometimes tuning up and back down will fix but not always.

It's really bad on Sundance tonight. I've tried changing the channel and then back. I even reset the receiver from the diagnostics/tools menu, but it didn't help.